MTNL SMTP Relay User Guide

Transcription

1 MTNL SMTP Relay User Guide Copyright (c) All rights reserved.

2 Table of Contents Introduction 1 Why 1 Poor Reputation 1 Solution 2 Which users are affected? 3 Affected MTNL Users 4 Pre-requisites - Dynamic IP 6 Get a Free MTNL Id 6 Add Aliases 6 Configuration - Concepts 10 Configuration - Microsoft Outlook - No Static IP 11 Configuration - Microsoft Outlook - Static IP 16 Configuration - Microsoft Live Mail - No Static IP 21 Configuration - Microsoft Live Mail - Static IP 25 Configuration - Thunderbird - No Static IP 28 Configuration - Thunderbird - Static IP 30 Configuration - Lotus Notes Client - No Static IP 32 Configuration - Lotus Notes Client - Static IP 34 Configuration - Servers - Static IP 36 ii

3 Index a iii

4 1.2 Poor Reputation 1 1 Introduction To enhance the security of MTNL Broadband network and make it SPAM free, MTNL is blocking port 25 for all its broadband clients. This guide gives full details on the blockage. While we do not expect most broadband users to be affected by this change, this guide presents some short term alternatives for those affected. If you are one of the users affected by this change, you will need to make some configuration changes. This document gives details on which MTNL Broadband users need to change configuration and how to change them. 1.1 Why MTNL, Mumbai is one of India's largest Broadband providers with more than 6 lakh clients. Due to its large size, there is always a certain percentage of PC's/users who connect to MTNL network and misuse by sending SPAM. Though the percentage of such users is small, these users send large volume of SPAM s and affect the service for genuine users. There are also many PC's which connect to MTNL broadband and which do not have adequate, up-to-date security measures like Anti Virus. Due to this, these PC's get easily hacked and zombie/trojan malware installed. These malware are installed without the knowledge of Broadband user. Once installed, these malware sends huge amount of SPAM through the end user's broadband line. A schematic of the scenario is given below Due to this, the end user's line becomes slow and data usage unnecessarily increases. 1.2 Poor Reputation As the amount of SPAM thus sent out increases, MTNL network reputation takes a hit. In a recent check in a blacklist database (check done on ), we find that MTNL is in the top 10 in the blacklist. Screenshot of the same is given below 1

5 1.3 Solution 1 Once a network reputation is poor, all its customers (including those who have secured PC's) take a hit. This affects all broadband clients of MTNL. 1.3 Solution This problem is not specific to MTNL. All reputed ISP's in the world face this issue. The standard solution for this is to block port 25 for broadband clients. This port is reserved for MTA (Mail Transfer Agents) to exchange s. A normal broadband user does not need to use this port. The table below gives some of the common things done by a broadband client and what ports is being used Action Used port(s) Browsing 80/443 Going to facebook/twitter 80/443 Sending s using Gmail / Yahoo / Webmail 80 / 443 Sending using Outlook / Thunderbird 465 / 110 / 143 / 993 / 995 / 587 As one can see, port 25 is not needed for above purpose. To send SPAM, any malware exclusively uses port 25. Therefore by blocking port 25 Malware is made ineffective. Hackers have no incentive to install malware. Some of the other large ISP's who have followed this method are: AT&T 2

6 1.4 Which users are affected? AOL Which users are affected? As we saw in the previous section, normal users are not affected by this blockage. However, there may be some users who are using port 25 to send s from Outlook / Thunderbird. These users need to make some changes. Once the blockage is in place, these users will not be able to send out s. Then the following should be done 1. Contact the Server administrator for your domain. 2. Get details of an alternative port (say 465 / 587) to send out s. 3. Incorporate the same into your client (Outlook / Thunderbird). 4. Now the s should go out fine. If the above process takes time, you can make use of MTNL relay account to send out s. If you do want to use MTNL relay accounts to send s, proceed to the next section. 3

7 2 2 Affected MTNL Users MTNL provides an account to all its Broadband users. This account can be used to send out s. You can use the tables below to find out if you will need to reconfigure your clients 1. Users who will need to reconfigure their clients Description Yes/No Are you using any of following client to send s? 1. Microsoft Outlook 2. Microsoft Windows Live / Outlook Express 3. Thunderbird 4. SMTP client and Does your Outgoing port configured as 25 in your client configuration? When you send s, does the remain in your Outbox and not go out? If you answered Yes to any of the above, you will need to change the configuration in your client. You may proceed to the next sections on how to do the same. 2. Users who do not need to change their Configuration Description Yes/No Do you send s only using Internet browser like the following: 1. Internet Explorer 2. Google Chrome 3. Mozilla Firefox 4. Apple Safari Do you use your MTNL connection only for browsing? 4 2

8 2 You only use a Free and you send s only using a browser. If you answered Yes to any of the above, this change will not affect you and you do not need to change any configuration. The move by MTNL will not affect you. 5

9 3.2 Add Aliases 3 Pre-requisites - Dynamic IP Prior to changing the configuration, you will need to obtain certain information from MTNL if your plan involves dynamic IP addresses. All MTNL connectivity is classified into two different categories. Those users who get Dynamic IP addresses and those users who get Static IP addresses. If your connection has a Static IP address, you do not need to do anything further and you can proceed to making changes in actual configuration. If your connection has a Dynamic IP address, or if you are not sure what category you belong to, please follow the instructions below. Now you are ready to configure the clients. 3.1 Get a Free MTNL Id 1. If you are a Broadband customer, register for the Free account provided by MTNL. You will get address. 2. To create the Free account, please send mail to [email protected] with following details Broadband Landline Number CA Number Desired address Mobile Number Alternate address 3. Once the address is created, you will be notified over the alternate address. 4. Once you have the address, confirm that you are able to login by logging into 5. Proceed to the next section 3.2 Add Aliases If you are using any other domain (Corporate or Free addresses) to send out s, you will need to add that address as a sender Alias. If you are to send out s, you may skip this section. 6 3

10 3.2 Add Aliases 1. Login to 2. Click on tab as indicated by a Red oval in the below figure 3 3. That will bring up the following window. Click on Administration menu as indicated by a Red oval in figure below. 4. That will bring up the following menu. Choose Accounts (as indicated by Red Oval) 5. That will bring up the following dialog. Double click on your account (as indicated by Red oval). 6. That will bring up the following dialog. Click on Manage sender aliases as indicated by Red oval. 7

11 3.2 Add Aliases 3 7. That will bring up the following dialog. In that click on Add button as indicated by Red oval. 8. That will bring up the following dialog. 8

12 3.2 Add Aliases 9. In the above dialog, enter Sender full name in Name field (indicated by Red oval). address you are using to send from in field (indicated by Green oval). Click on OK button (indicated by Blue Oval). 10. Click on OK / Close on all the dialogs and Logout of Webmail. 11. To confirm that you are the owner of the ID that is added, Rainmail Server will ask you to confirm by clicking on a link in the sent to the added ID. 12. Open your client / Webmail to access your . You should see an like below. Click on the confirmation link as indicated by Red oval That will bring you to the following page 14. Now you are ready to use MTNL as a relay server. You can add up to two addresses as Alias per MTNL ID. 15. Proceed to the next sections for configuration changes. 9

13 4 4 Configuration - Concepts In this document, we will give instructions for some popular clients. We will also explain the configuration conceptually so that MTNL users can configure other clients. The concept is to send s through the MTNL Anti SPAM server. For sending the same, following details should be used 1. For users with Static IP connectivity - with IP based mail relay Parameter Value Outgoing SMTP Server / Relay Server smtp.mtnl.net.in Outgoing SMTP Port Number 587 Use SSL No Outgoing Server requires authentication No 4 2. For users without Static IP connectivity - who have alias based relay Parameter Value Outgoing SMTP Server / Relay server smtp.mtnl.net.in Outgoing SMTP Port Number 587 Use SSL No Outgoing Server requires SMTP Authentication Yes SMTP Authentication user name ID obtained from MTNL e.g., [email protected] SMTP Authentication password Password for ID obtained from MTNL 10

14 5 5 Configuration - Microsoft Outlook - No Static IP If you are using MTNL connection without Static IP (using alias based relay) and Microsoft Outlook to send out s, you will need to make the following changes to ensure that your s go out properly. The following instructions will guide you on what is to be done. If you have configured multiple accounts, you will need to do the below for each account. 1. Open up Microsoft Outlook and click on File menu. That will bring up the following screen Click on Account Settings and that will bring up the following dialog 11

15 In the above dialog, double click on he account (as indicated by Red Oval). That will bring up the following dialog. 4. In the above dialog, in the Outgoing mail server (SMTP) edit box (indicated by Red Oval in above page), enter value as smtp.mtnl.net.in 12

16 Click on the More Settings button (indicated by Red Oval above). That will bring up the following dialog. 5. In he above dialog, click on Outgoing Server tab. That will bring up the following dialog. 13

17 In the above dialog 1. Check the My outgoing server (SMTP) requires authentication box (as indicated by Red Oval) 2. Click on Log on using (indicated by Green Oval) 3. Enter address in User Name edit field. 4. Enter the above account's password in Password edit field (indicated by Blue Oval) 5. Check the Remember Password box (as indicated by Yellow Oval). 7. In the dialog above, click on Advanced tab (indicated by Red Oval). That will bring up following dialog. 14

18 In the above dialog in the edit field for Outgoing server (SMTP) (indicated by Red Oval), enter Click on OK and close all the dialogs. 10. Now you are all set to send out s using MTNL network. 15

19 6 6 Configuration - Microsoft Outlook Static IP If you are using MTNL connection with Static IP (using IP based relay) and Microsoft Outlook to send out s, you will need to make the following changes to ensure that your s go out properly. The following instructions will guide you on what is to be done. If you have configured multiple accounts, you will need to do the below for each account. 1. Open up Microsoft Outlook and click on File menu. That will bring up the following screen Click on Account Settings and that will bring up the following dialog 16

20 6 3. In the above dialog, double click on the account (as indicated by Red Oval). That will bring up the following dialog In the above dialog, in the Outgoing mail server (SMTP) edit box (indicated by Red Oval in above page), enter value as smtp.mtnl.net.in 17

21 6 4. Click on the More Settings button (indicated by Red Oval above). That will bring up the following dialog In the above dialog, click on Outgoing Server tab. That will bring up the following dialog. 18

22 6 6. In the above dialog 1. Uncheck the My outgoing server (SMTP) requires authentication box (as indicated by Red Oval) 6 7. In the dialog above, click on Advanced tab (indicated by Red Oval). That will bring up following dialog. 19

23 6 8. In the above dialog in the edit field for Outgoing server (SMTP) (indicated by Red Oval), enter Click on OK and close all the dialogs. 10. Now you are all set to send out s using MTNL network. 6 20

24 7 7 Configuration - Microsoft Live Mail No Static IP If you are using MTNL connection without Static IP (using alias based relay) and Microsoft Live Mail to send out s, you will need to make the following changes to ensure that your s go out properly. The following instructions will guide you on what is to be done. If you have configured multiple accounts, you will need to do the below for each account. 1. Open up Microsoft Live Mail and right click on configured account (as indicated in Red) That will bring up the following menu. 3. Click on Properties (as indicated by Red Oval above) and that will bring up the following dialog 21

25 7 3. In the above dialog, click on Servers tab (indicated by Red Oval). That will bring up the following dialog In the above dialog, 1. In the Outgoing mail server (SMTP) edit box (indicated by Red Oval in above page), enter value as smtp.mtnl.net.in 2. Check My server requires authentication box (indicated by Blue Oval). 3. Click on Settings button (indicated by Green Oval) 4. That will bring up following dialog. 22

26 7 4. In the above dialog: 1. Click on Log on using (indicated by Red Oval) 2. Enter address in Account Name edit field (indicated by Blue Oval) 3. Enter the above account's password in Password edit field (indicated by Green Oval) 4. Check the Remember Password box (as indicated by Yellow Oval). 5. Click on OK to close the dialog 7 7. In the dialog above, click on Advanced tab (indicated by Red Oval). That will bring up following dialog. 23

27 7 8. In the above dialog in the edit field for Outgoing mail (SMTP) (indicated by Red Oval), enter Click on OK and close all the dialogs. 10. Now you are all set to send out s using MTNL network. 7 24

28 8 8 Configuration - Microsoft Live Mail Static IP If you are using MTNL connection with Static IP (using IP based relay) and Microsoft Live Mail to send out s, you will need to make the following changes to ensure that your s go out properly. The following instructions will guide you on what is to be done. If you have configured multiple accounts, you will need to do the below for each account. 1. Open up Microsoft Live Mail and right click on configured account (as indicated in Red) That will bring up the following menu. 3. Click on Properties (as indicated by Red Oval above) and that will bring up the following dialog 25

29 8 3. In the above dialog, click on Servers tab (indicated by Red Oval). That will bring up the following dialog In the above dialog, 1. In the Outgoing mail server (SMTP) edit box (indicated by Red Oval in above page), enter value as smtp.mtnl.net.in 2. Uncheck My server requires authentication box (indicated by Blue Oval). 26

30 8 7. In the dialog above, click on Advanced tab (indicated by Red Oval). That will bring up following dialog In the above dialog in the edit field for Outgoing mail (SMTP) (indicated by Red Oval), enter Click on OK and close all the dialogs. 10. Now you are all set to send out s using MTNL network. 27

31 9 9 Configuration - Thunderbird - No Static IP If you are using MTNL connection without Static IP (using alias based relay) and Thunderbird to send out s, you will need to make the following changes to ensure that your s go out properly. The following instructions will guide you on what is to be done. If you have configured multiple accounts, you will need to do the below for each account. 1. Open up Thunderbird, click on Tools -> Account Settings menu. That will bring up the following dialog Click on Outgoing Server (SMTP) (indicated by Red Oval). That will bring up the following dialog. 28

32 9 3. Click on Edit (as indicated by Red Oval above) and that will bring up the following dialog 9 4. In the above dialog, 1. In the Server Name edit box (indicated by Red Oval in above page), enter value as smtp.mtnl.net.in 2. In Port edit box (indicated by Blue Oval), enter value as Enter address in User Name edit field (indicated by Green Oval) 5. Click on OK and close all the dialogs. 6. Now you are all set to send out s using MTNL network. 29

33 10 10 Configuration - Thunderbird - Static IP If you are using MTNL connection with Static IP (using IP based relay) and Thunderbird to send out s, you will need to make the following changes to ensure that your s go out properly. The following instructions will guide you on what is to be done. If you have configured multiple accounts, you will need to do the below for each account. 1. Open up Thunderbird, click on Tools -> Account Settings menu. That will bring up the following dialog. 2. Click on Outgoing Server (SMTP) (indicated by Red Oval). That will bring up the following dialog

34 10 3. Click on Edit (as indicated by Red Oval above) and that will bring up the following dialog 4. In the above dialog, 1. In the Server Name edit box (indicated by Red Oval in above page), enter value as smtp.mtnl.net.in 2. In Port edit box (indicated by Blue Oval), enter value as Select No authentication in Authentication method list box (indicated by Green Oval) 5. Click on OK and close all the dialogs. 6. Now you are all set to send out s using MTNL network. 31

35 11 11 Configuration - Lotus Notes Client No Static IP If you are using MTNL connection without Static IP (using alias based relay) and Lotus Notes Client to send out s, you will need to make the following changes to ensure that your s go out properly. The following instructions will guide you on what is to be done. If you have configured multiple accounts, you will need to do the below for each account. 1. Open up Lotus Notes Client, click on File -> Preferences menu. That will bring up the following dialog. 2. In the above dialog 1. Click on Accounts (indicated by Red Oval) and select the pane. 2. Click on Outgoing Internet mail (indicated by Blue Oval) item. 3. Click on Edit Account (indicated by Green Oval) button. 4. That will bring up the following dialog 11 32

36 11 3. In the above dialog, 1. In the Server edit field (indicated by Red Oval), enter smtp.mtnl.net.in 2. In the Name edit field (indicated by Blue Oval), enter your full MTNL address. 3. In the Password edit field (indicated by Green Oval), enter MTNL password. 4. Click on Advanced properties (indicated by Black Oval). 5. In the Port number edit field (indicated by Yellow Oval), enter Click on OK and close all the dialogs. 5. Now you are all set to send out s using MTNL network

37 12 12 Configuration - Lotus Notes Client Static IP If you are using MTNL connection with Static IP (using IP based relay) and Lotus Notes Client to send out s, you will need to make the following changes to ensure that your s go out properly. The following instructions will guide you on what is to be done. If you have configured multiple accounts, you will need to do the below for each account. 1. Open up Lotus Notes Client, click on File -> Preferences menu. That will bring up the following dialog. 2. In the above dialog 1. Click on Accounts (indicated by Red Oval) and select the pane. 2. Click on Outgoing Internet mail (indicated by Blue Oval) item. 3. Click on Edit Account (indicated by Green Oval) button. 4. That will bring up the following dialog 12 34

38 12 3. In the above dialog, 1. In the Server edit field (indicated by Red Oval), enter smtp.mtnl.net.in 2. Click on Advanced properties (indicated by Green Oval). 3. In the Port number edit field (indicated by Blue Oval), enter Click on OK and close all the dialogs. 5. Now you are all set to send out s using MTNL network

39 13 13 Configuration - Servers - Static IP With a static IP from MTNL, it is possible to run servers. Since port 25 is blocked, MTNL clients will have to change their server configuration so that s are relayed out through smtp.mtnl.net.in (MTNL Anti SPAM server), using port 587. In this section, we will present the configuration to be done for popular servers. Server Sendmail Instructions 1. Edit sendmail.mc file (usually present in /etc/mail/sendmail.mc) 2. Add the following lines to the file define(`smart_host',`relay:smtp.mtnl.net.in')dnl define(`relay_mailer',`esmtp')dnl define(`relay_mailer_args', `TPC $h 587')dnl 3. make -C /etc/mail 4. Restart sendmail Postfix 1. Add the following to main.cf (usually present in/etc/postfix/main.cf) relayhost = smtp.mtnl.net.in: Reload postfix Qmail 1. Add the following line to smtproutes (usually in /var/qmail/control/smtproutes) :smtp.mtnl.net.in: Restart Qmail Lotus Domino Server See this URL: c1d ?OpenDocument 13 36

40 13 Microsoft Exchange Server 1. Open MMC 2. Go to Servers -> Protocols 3. Select Default SMTP Virtual Server Properties 4. Go to Delivery tab 5. Click on Advanced Button 6. Enter smtp.mtnl.net.in in Smart Host edit box. 7. Close MMC 8. Open Exchange Management Shell using Start -> Programs -> Microsoft Exchange Server -> Exchange Management Shell 9. By Default the "Send Connector" is called "All Outbound" unless you have changed it or added additional connectors. To determine this you can type the following at the Exchange Management Shell Get-SendConnector 10. Type the following Set-SendConnector -Identity "All Outbound" -port 587 or the following if your connector is called something else from the default Set-SendConnector -Identity "SENDCONNECTORNAME" -port Restart SMTP Service 13 37

41 14 Index A Add Aliases 6 Affected MTNL Users 4 C Configuration - Concepts 10 Configuration - Servers - Static IP 36 Configuration - Lotus Notes Client - No Static IP 32 Configuration - Lotus Notes Client - Static IP 34 Configuration - Microsoft Live Mail - No Static IP 21 Configuration - Microsoft Live Mail - Static IP 25 Configuration - Microsoft Outlook - No Static IP 11 Configuration - Microsoft Outlook - Static IP 16 Configuration - Thunderbird - No Static IP 28 Configuration - Thunderbird - Static IP 30 G Get a Free MTNL Id 6 I Introduction 1 P Poor Reputation 1 Pre-requisites - Dynamic IP 6 S Solution 2 W Which users are affected? 3 Why 1 a